en_tn/act/16/04.md

General Information:

The word "they" here refers to Paul, Silas (Acts 15:40), and Timothy (Acts 16:3).

for them to obey

"for the church members to obey" or "for the believers to obey"

the ordinances decided on by the apostles and elders

This can be stated in active form. Alternate translation: "the ordinances that the apostles and elders in Jerusalem had decided on and written down" (See: rc://en/ta/man/jit/figs-activepassive)